This review may contain spoilers. I can handle the truth.
The first act and a half is enjoyable, with several effectively tense sequences. Unfortunately from there onward the film plays out predictably and very frustratingly. It leans on the tired trope of no one believing the protagonist's assertion that a conspiracy is underfoot, and yet the character and narrative logic that underlies this scenario flies in the face of the set-up of the first half. The performances are not strong enough to carry a dodgy story and the self-assured yet horribly misguided directorial and editing choices of the climax undo any goodwill the first act achieved.